Gear-grinding machine



A. T. BROWN. GEAR GRINDING mcmmz;

APPLlCATlON FILED JULY 5. I918.-

Patented Feb. 3, 1920.

a suns-swan 1.

IN VE N TOR A TTORNE Y8 A. T. BROWN.

GEAR GRINDING MACHINE.

APPLICATION man JULY 5.131s.

1329,8844 I I Patented Feb. 3,1920.

3 SHEETS-SHEET 2- 10 i a 11 l I 1 INVENTOR A TTORNEYS Patented Feb. 3, 19.20.

3 $HEET$-SHEET3 MENTOR ATTORNEYS h N MN \I lll" l I l I II \N a vN I l I l l II I fl l l cl l lduhn l lJl h l H H A. T. BROWN. GEAR camomc MACHINE.

APPLICAHON FILED JULY 5.1918- i To all whom it may concern:

UNITED STATES PATENT OFFICE;

ALEXANDER 'r. imowN, or SYRACUSE, NEW YORK, .ASSIGNOB'. TO THE BROWN-LIFE v GEAR COMPANY, or sYnAcUsE, NEW YORK, A CORPORATION or NEW YORK.

:GEABr-GRINDING MACHINE.

Be it known that I, ALEXANDER T. BROWN, a citizen of the United States,-and a resident of Syracuse, in the county of Onondaga and State of New York, have invented a certain new and useful Gear-Grinding Ma chine, of which the following is a specification.

This invention relates to gear grinding or generating machines of the type'in which "the gear is rolled during the grinding or had to the accompanying drawings in whichv like characters designate corresponding parts in all the views.

Figure 1 is a side elevation of-one form of gear grinding machine provided with my invention.

Fig. 2 isanenlarged front elevation,-

partly broken away, of parts seen in Fig. 1. Figs. 3 and 4 are respectively, fragmentary plan-and elevational views of the means for rolling the gear and for adjusting the gear preliminary to the rolling thereof.

I have here shown this means as embodied in the type of gear grinding machine as disclosed in the application of Alexander T. Brown, Sr. No. 818,473, filed Feb. 13, 1914.

1 designates the frame of the machine, 2 the grinder, there being usually two grinders 2 each mounted on a shaft 3 arranged at an inclined angle to the shaft 3 on which the other grinder is mounted so thatthe grinders converge toward each other as shown in Fig. 3, each shaft 3 having a driving pulley 4 thereon.

The means for supporting and rolling the gear during the grindin operation COII'L- prises a carriage 1 slidable in suitable ways 5 provided in the frame 1 in front of the grinders 2, a spindle 6 carried by the carriagel and movable therewith, and means for rocking the. spindle (5 during the reciprocating movement of the carriage 1. The carriage 1-is reciprocated in any suitable manner as by a connecting rod 7 pivoted at one end at- 8 thereto and at its other end to an eccentric pin 9 mounted on a disk 10 Specification 01 Letters 1mm. P t t d 3, 1920,

Application filed July 5, 1918. Serial No. 243,416.

which in turn is mounted upon a shaft 11 actuated in any suitable manner.

12 designates a suitable indexing means for shifting the spindle 6 relatively to the rolling means to carry new teeth to the grlnders as will be understood by those skilled in the art.

The carria e also includes a suitable means for hol ing the gear 13 on the spindle 6.as the arm 14: but asthe operation of the carriage 1, indexing means 12, and arm 14 form no part of thisinvention, a detail description thereof isunnecessary.

The only feature to be considered in so far as the present invention is concerned, is

that the spindle 6 rocks to roll the gear 13 relativel to the grinders 2 during the reciprocation of the carriage 1.

The means for rocking-the spindle 6 in i order to roll the gear, as here shown, in

cludes a drum or. cylinder 15 mounted 00- axially with the spindle 6, straps 16 and .17 winding on the periphery of the drum 15 in opposite directions, and, means connecting the outer ends of the straps to the frame 1.-

There are two straps 16 and two straps 17,

but each pair of straps 16 or 17 acts as one strap.

Said connecting means are adjustable simultaneously to pay -out one pair of stra s 16 or 17 andcorrespondingly take 11 t e other pair of straps 16 .or '17,- in'or er to slightly rotate the spindle 7 to bring the teeth of the gear 13 in juxtaposition to the grinders 2.

The connecting means as here shown includes threaded stems 19, 20 .connectedrespectively to the straps 16 and 17 and movable endwisely in suitable guides formed in bearings or brackets 21 carried by the frame 1,,and means for simultaneously moving one of said stems endwisly to pay out the straps connected tl'iereto and moving the other connecting means endwisely to take up the strap connected thereto.

As here shown. the. means for ad1ust1ng the stems 19, 20 comprises nuts 22, 23.

threading respectively on the stems 19, 20,

and having peripheral gear teeth 24: and an ad |ust1ug member 25 common to both nuts 22, 23 and being ournaled 1n the bearings 21, the adjusting member having peripheral gear teeth 26 meshing respectively with the teeth of the nuts 22, 23.

In operation, when the gear 12 is placed on the spindle, it is seldom that it comes in properposition; relatively to the grinding,

surfaces of the 'gli inders 2 and heretofore in orde'rto bring t e gears in juxtaposition to 4 the grinders,2, the gears have been shifted bodily about the axis-of the shaft 2, thisv operation. necessitating various manipulatic'ns, including loosening of the nut 27 which holds the gear on the spindle 6 and other. operations making this. nut accessible.

' By my invention, each gear is placed with its teeth in juxtaposition to the grinders by merely= .-turningr the adjusting member 25.

one way or' the other to cause one set of straps 16 or 17"to pay. out and theother set,

' of straps to take upthusslightly rotating .the'drumlb and the shaft 6.

. s What I claim-is: =20,

1. A, gear grinding machine comprising a grinder, meansfor supporting and rolling the gear'during the grindin operation comprising-a pair fof opposite y disposed elementsy andmeans for adjusting said support1ng 'and rolling means about itsaxis COIIIPIlSlng adjusting mechanism. coacting with said'elements slmultaneously to adjust said elements to the same extent, substan tially as andior the purpose described.

2. A gear grinding machinecomprising a grinder, means for supporting and roll ng the gear during the grinding operation comprising .arpair of-oppositely disposed straps, Q and adjusting means operable to simulta-fl -neously'pay out one=stra and .take up the other correspondingly, substantially; as and for the: purpose; s ecified.

. the drum in oppositedirections, 'nieans 3'.--A gear -grin mg machine comprising a frame, a' inder, means for supporting and rolling t m. gear during the grind ng operation comprising a carriage, a spindle -on the carriage on which the gear is mounted, means for rotating thespindle during the mo ement of the carriage, including a drum mounted on the -spi ndle, straps winding on coupling the outer ends of the strap and the frame, and means for operating the coupling ineanstosimultaneously pay out one strap and take up the other, substantiall as and forthe purpose set forth.-

4.'A gear gr nding machine comprising a grinder. meanstor sup 'iorting" and rolling the gear during the grinding operation coinrising a drum, straps indingon'thc drum in opposite directions. an'dstationa'ry means connected to theou'ter ends of the straps ,,and

adjustable for paying out one strap and cor-.-

' res 'iondingly taking up the other. substantially as and for the purpose described.

5; A gear grinding-machine comprising a grinder, means-for supporting and rolling the gear during the grinding. operation coinrising a drum, straps winding on the drum in opposite directions, and stationary means.

connected to the outer ends of the straps, and adjustable for ayin'g. out one strap and. correspondingly .taliing up-theother, said means comprising endwisely adjustable stems connected to the outer ends of the straps respectively, and means common -'to both stems .for moving the same endwisely .in the samedirection, substantially asand for the pnrposefspecified.

- 6. A gear grinding machine comprising a grinder, means for supporting and rolling 1- the gear during. the grinding operation com-- prising adrum, straps winding on the drum and rolling the gear during the grinding operation comprising a carriage reciprocally movable on'theframe to carry the gear crosswise of the grinder, a spindle carried by "and movable nitlilthe carriagc,' neans for rocking the spindleduring the movement .of the.

carriage comprising a drum mounted on the spindle, straps winding on the drum in op-1100 posite directions, and means connecting the outer ends of the straps to the frame, and

means for' simultaneously adj listing-the con; necting means at the outer ends of the straps to pay-out one strap and correspondingly take up the other, substantially as and for the purpose described.

8. A gear grinding machine comprising ,a drum. a grinder, means for supporting and rolling the gear duringthe grinding operati0n comprising a carriage reciprocally movable on the frame to arrv the gear crosswise of the grinder. aspindle carried by and movable with the carriage, means for, rockingthe spindle during'the movement of the. 116

carriage comprising a drum mounted on the spindle. straps winding on the drum in opposite directions. and means connecting the outer-ends of the straps to the'frame, the

connecting means comprising 'cndwiselyl2 0 movableg -threadcd-' stems slidable in the frame, nuts, threading. on the stems, and meanspommon to both the nuts for turning the same to. more the stems, substantially as Y and for the, purpose specified.

In testimony, whereof I have {hereunto signed my name, at Sy-"i'acuse, in the county' of' Onondaga. and State of New York, this 22nd day of June. 1918. I

. ALEXANDER T. BROWNv 

